Ugh, guess your right AGAIN. But a repeating pattern doesn't mean that it will happen yet again. Just like with HDDVD and Bluray, it seemed as if HDDVD was the better solution, and cheaper and would stay that way, but it died out. (not really sure where I'm going with this). But, DDR3 may not be as widely adapted as thought to...
I know DDR3 has higher clock speeds, but yet again, from what I see at my local computer stores, the fastest DDR2, costs less than the slowest DDR3. Idk. That might be only here, and not online. I still believe though, that a DDR2 motherboard would be worth it, for now. You can always resell for 80-90% of the price, when DDR3 goes cheaper.